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Mi Digital High Torque Metal Gear Servo JR/Hitec 11.8kg / 0.07 / 61g
The HK Mi Series servos represent the next break through in high precision servo technology. Using Magnetic Induction, rather than a potentiometer, for an unsurpassed level of accuracy and performance.
Mi : Magnetic Induction, uses a Magnetic Rotary Encoder in place of a traditional potentiometer (invented in 1877). Magnetic Rotary encoders have a longer life and suffer less wear.
I use two of these servos with mag encoder. Once they are seperated from each other, they work fine. But installed in a small plane, where they have to be placed one by one very near, one servo is moving fast fore and back when the other one is steared by radio and vice versa. Is it possible, that there is a magnetic interference to the encoder may be produced by mag. field of motor from other servo?
I received this servo today and it doesn't really work!!!
The gear just turns round and round and it doesn't stop!!! Can you please send me a working one?
Or can I do something about it?
I am using it on my 1/10th scale HPI blitz truck. It is a large servo. It is fairly heavy. It would not seem fit for flight unless it was a large helicopter.
Thanks Jakou, but I seriously doubt that the servo will go up in flames on 7.4 volts. I'm looking to see if anyone has used these as High Voltage Servos or will a voltage regulator be needed.
Don't run these at over 280hz, the digital amplifier can handle the frequency (as per the specs on blue Arrow's website) but the servo's heat dissipation isn't enough to get rid of the excess heat and it will cook itself to death, especially if used on a gyro. Stay at 250hz and it's a good servo.
Actually I take that back, they seem to run fine at 333hz with no overheating. It may depend on your gyro. I would try running it at 333hz and if it starts getting too hot drop down to 250hz YMMV
I have 3 of these on my heli swash plate. 1520pulse 333hz. They chatter a lot! And when I load 1 servo, they start chatting more and even all of them start to go back and forward quickly a few degrees, fighting to keep their position. These are BlueArrow servos, I'll check up the specs there also.
I hope another setting keeps them quiet and keep their position.
It may be a combination of the frequency and your gyro. I would try dropping down to 250hz and see if that fixes it. On cyclic servos the difference in performance between 250hz and 333hz is basically non existent.
yeah, I'd like to know what spline is on this as well? I took the plunge and purchased one but I want to make sure I have a saver to fit into my Tamiya TT01D. Thanks guys
Whats the dif. between this one and the red case one other than the hight? They have the same specs, so why would you want a taller servo that does the exact same thing? red one is model#HK47011DMG
Thanks you, whoever answers this.
This is the coreless motor version, witch means that the start/stop times are much more short, can have better mechanical resolution and a more smooth travel
According to the vendor, that should be great for steering on big planes and RC 1/8 class cars.
HK could you also please copy the application notes from the vendor? It would be easier than going there and looking up everything :)
Thanks!
Customer Reviews
Overall Rating
planekrazy
11 likes
Value
Quality
1 thumbs up!
Short: I got this servo and am very happy with it.
Long: At first I ordered one for a short course truck dedicated to bashing. Been using it for 3 months now for steering, some replaced parts on the truck however no problems ever with the servo. This Mi servo is very strong and fast and so far has been totally reliable. About a month ago I ordered another one of these servo for a different SC truck used for racing. Have run the 2nd servo for a couple weeks now and it works great, no issues like the first one. Well since the first two were good I just ordered a 3rd Mi servo to upgrade the BMS-661DMG steering servo of my 1/10 drift car. The 661D is cheaper but this Mi servo is faster, smoother and higher torque headroom for my application. Me like it!
2 comments. Reply..
Overall Rating
KaYs3r
9 likes
Value
Quality
Like it?
Tested this servo only once, it's working great, really fast...
It only needs to last for a good time to be an excellent servo.
No comments. Reply..
Overall Rating
Yago
6 likes
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Quality
Like it?
Tested this servo only once, it's working great, really fast... It only needs to last for a good time to be an excellent servo.
No comments. Reply..
Overall Rating
gonyo
42 likes
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Quality
Like it?
Nach mehr als 100 (schonungslosen) FLUEGEN als TS-Servo am T-Rex600 FBL (Direktanlenkung) kaum Spiel und ohne jegliche
Probleme.
1 comment. Reply..
Overall Rating
jaubertel
147 likes
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Quality
Like it?
Ils paraissaient pourtant prometteurs...3 servos montés sur un T-Rex600, utilisé en 3D hard: 1 servo a bloqué d'un coup, après démontage, il y avait un axe en trop qui promenait dans les pinions, le deuxième a du couple dans un sens mais presque rien dans l'autre sens, et le troisième ne démarre qu'après avoir un peu tourné le palonnier! Voilà, l'hélico est encore entier mais c'est un miracle...
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